<!DOCTYPE html>
<html>
    <head>
        <style type="text/css">
            body {
                margin: 0;
            }
            .ahem {
                background-color: red;
                width: 50px;
                height: 50px;
                position: absolute;
                top: 100px;
            }
        </style>
    </head>
    <body>
        <div><img src="100x100_green.png"></div>
        <div class="ahem"></div>
    </body>
</html>
